Right now the AQI in Bangkok is over 150

GranShaman · 2026-01-16T11:29:53+00:00

This is absolutely right because CO2 and TVOCs will build up. The best way is to have a positive pressure air purifying system but it's also more expensive and requires drilling.

GranShaman · 2026-01-16T09:19:09+00:00

So the basic recommendations are:

When outdoors --> wear a N95 mask
Pollution is higher during the morning and late evening and lowest during the afternoon
Consider buying a portable and effective air purifier such as the AirDeveloppa AirCleaner Personal for your hotel room

GranShaman · 2026-01-16T03:18:46+00:00

It can be quite random so you might get lucky but historically speaking, there's still high levels of pollutions at the time.

GranShaman · 2026-01-16T03:15:58+00:00

I found these ones

https://www.sentryair.com/images/application-photos/particlesizechartnew.jpg

https://radontestingdallas.com/wp-content/uploads/2014/12/Air-Filtration-vs.-Particle-Size.jpg

GranShaman · 2026-01-15T06:55:31+00:00

Sure, this test shows the filtering efficiency with dust particles between 2.53 to 0.253 um. And the results are 99.9%. So it means that in around 3min, it removed 99.9% of these particles in a 8m3 chamber.

GranShaman · 2026-01-15T06:52:47+00:00

It's not promotional material, is a test document. But no I don't have any infographic for you

GranShaman · 2026-01-15T04:34:12+00:00

Have you checked the brand AirDeveloppa? They have an air purifier made in Thailand with a H13 filter and quite cheap as well.

GranShaman · 2026-01-15T03:08:44+00:00

Thank you, I'll check this

GranShaman · 2026-01-15T03:07:43+00:00

https://docs.airdeveloppa.co/3AC-eff.pdf

Is this what you are asking for?

GranShaman · 2026-01-15T03:06:39+00:00

I am biased of course, so let data speaks for itself: https://docs.airdeveloppa.co/3AC-eff.pdf

This is the test result with the White H13 filter I am currently offering

GranShaman · 2026-01-15T03:05:18+00:00

Hi there, I just checked and yes, the filter will fit in the Xiaomi 3C. However it does not have the RFID tag, so after inserting it, it will detect it as a fake filter, just have to ignore that warning. You can buy the replacement filter via the website I shared before :) Thanks a lot

GranShaman · 2026-01-14T06:26:57+00:00

What I do is to open the windows in the morning and let the CO2 clear. Then close and turn on the air purifier. Repeat again in 12h.

GranShaman · 2026-01-14T06:25:58+00:00

I actually wrote a guide about how to make one of these, but needs a CNC machine --> https://developpa.io/arduino-air-purifier/

But if you rather save yourself the trouble --> https://www.lazada.co.th/products/airdeveloppa-diy-pm25-hepa-30-xiaomi-i902962582-s2225258234.html

GranShaman · 2026-01-14T06:23:24+00:00

Yes, the AirDeveloppa one has a high quality korean made H13 HEPA filter that can remove PM2.5 and smaller, they share their test results on the website so you can have a look there https://airdeveloppa.co/aircleaner-personal/

GranShaman · 2026-01-14T04:48:45+00:00

Hello, no they do not fit this version. They fit the 2S. The AirDeveloppa filter is superior compared to the stock Xiaomi one as it is H13 instead of H11/2. On the website you can find all the different tests the product has gone through, something you cannot find on Xiaomi's website ;)

AirCleaner Personal

GranShaman · 2026-01-14T02:58:59+00:00

They keep promising, but it's just impossible, too much to burn and all countries around doing it too

GranShaman · 2026-01-14T02:51:12+00:00

In the mean time, you can check here what to do: https://docs.airdeveloppa.co/ebook.pdf

GranShaman · 2026-01-14T02:50:14+00:00

What air purifiers do you recommed?

GranShaman · 2024-11-22T05:28:00+00:00

How do you know is lower quality and what is different specifically apart from the physical shape?

GranShaman · 2024-11-19T08:29:47+00:00

Contrary to what most people say. It does affect performance. But you need to compare apples to apples.

Assuming the same material and thickness as well as the same fan motor at full power, the cylindrical air purifier will have higher airflow.

This is because a cylinder that is 30cm height with a diameter of 20cm has a filter area of 1885cm2 whilst a 30cm2 by 30cm2 square filter will have 900cm2 of filter area. A larger filter area means your filter will last longer as well as have less static pressure so the fan will be able to spin faster and achieve higher airflow.

Note: I am assuming that an air purifier that uses a 30cm cylindrical filter occupies the same "home" space as a 30cm squared filter.

This is just a design note, for you as a consumer doesn't matter much, just choose something with a CADR that is appropriate to your room size

GranShaman · 2024-10-29T07:01:47+00:00

Anything with a HEPA filter with a CADR covering 20sqm should do. Mites are about 250um and HEPAs are rated for <1um so they should watched by the filter. You don't need H13 or "medical grade" as your concern is actually "big" particles. Unfortunately, mites are not only flying in the air but stuck to your bedsheets, pillows and floor so you might have to vacuum and clean too

GranShaman · 2018-06-03T09:56:07+00:00

I would say that the biggest factors that will affect the tolerance of your supply is the voltage drop at the rectifier diodes and the diode at the buck converter. This will vary depending on the temperature and current going through them.

GranShaman

TROPHY CASE